US2446164A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring unit
Assignee: ACF Industries Inc
•
Filing: 1943-01-05
•
Granted: 1948-07-27
•
Expires: 1963-01-05
Abstract
No abstract record available.
Inventors
- 👤 Willoughby Victor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:19
CPC Classifications
B; B61; B61F; B61F5/00; B61F5/02; B61F5/04; B61F5/12; B61F5/122
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US932215A
Cited
US1169863A
Cited
US1503192A
Cited
US2015820A
Cited
US2108124A
Cited
US2095933A
Cited
US2289790A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-27 | 1952-01-26 | 1952-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-27 | 1956-01-26 | 1956-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-27 | 1960-01-26 | 1960-07-27 | $7700.00 | Window Closed / Lapsed |